Re: [WISPA] [WUG] Monitoring AC Current
What about using a Hall Effect current clamp? Thought about that pretty hard. Actually ordered in some big cheap cheap torrids to go around the AC line. Never got time to try it though. Use a bridge regulator on the shunt. Then meter the output of the bridge. Almost exactly what I am looking at doing now. Have PacketFlux 10 amp shunt on order. Will feed that into isolation transformer then with diode, capacitor and resisters convert that to a DC voltage. Am hoping with resistive voltage divider I can convert it to 0 - 300 mv since I have other plans for the other 12-30 volt inputs. I want to monitor and graph current on a 120V AC line. Not DC current. WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] [WUG] Monitoring AC Current
Why do you need to step that up instead of just using the 0-100mv input (labeled shunt) on the packetflux sitemonitor. Not sure I'm following you. I want to monitor and graph current on a 120V AC line. Not DC current. WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] [WUG] Monitoring AC Current
Use a bridge regulator on the shunt. Then meter the output of the bridge. On 2/25/2011 12:23 PM, Matt wrote: Why do you need to step that up instead of just using the 0-100mv input (labeled "shunt") on the packetflux sitemonitor. Not sure I'm following you. I want to monitor and graph current on a 120V AC line. Not DC current. WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] [WUG] Monitoring AC Current
That was supposed to be bridge rectifier ...On 2/25/2011 1:53 PM, Blair Davis wrote: Use a bridge regulator on the shunt. Then meter the output of the bridge. On 2/25/2011 12:23 PM, Matt wrote: Why do you need to step that up instead of just using the 0-100mv input (labeled "shunt") on the packetflux sitemonitor. Not sure I'm following you. I want to monitor and graph current on a 120V AC line. Not DC current. WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] [WUG] Monitoring AC Current
Use a bridge regulator on the shunt. Then meter the output of the bridge. Almost exactly what I am looking at doing now. Have PacketFlux 10 amp shunt on order. Will feed that into isolation transformer then with diode, capacitor and resisters convert that to a DC voltage. Am hoping with resistive voltage divider I can convert it to 0 - 300 mv since I have other plans for the other 12-30 volt inputs. I want to monitor and graph current on a 120V AC line. Not DC current. WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] [WUG] Monitoring AC Current
What about using a Hall Effect current clamp? On Fri, Feb 25, 2011 at 2:38 PM, Matt lm7...@gmail.com wrote: Use a bridge regulator on the shunt. Then meter the output of the bridge. Almost exactly what I am looking at doing now. Have PacketFlux 10 amp shunt on order. Will feed that into isolation transformer then with diode, capacitor and resisters convert that to a DC voltage. Am hoping with resistive voltage divider I can convert it to 0 - 300 mv since I have other plans for the other 12-30 volt inputs. I want to monitor and graph current on a 120V AC line. Not DC current. WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] [WUG] Monitoring AC Current
Why do you need to step that up instead of just using the 0-100mv input (labeled shunt) on the packetflux sitemonitor. Not sure I'm following you. On 2/24/2011 3:43 PM, Matt wrote: I need to monitor current on an AC line at a tower site. Like 5 amps at 120 VAC. I would like to graph it with something like 'Site Monitor' from 'Packet Flux' which has a 0 - 100mv DC input among other inputs. Does anyone know a good way to convert to that hopefully with some surge protection as well? Was considering using there 10amp current shunt right on the AC input then using a transformer and rectifier to step that back up from 100mv to about 1 - 3 volt DC. Then inputting that into the 'Site Monitor'. Surely there is an easier way? --- Wireless Users Group us...@wug.cc -- Randy Cosby| InfoWest, Inc | www.infowest.com Vice President | 435-674-0165 x 2010 | facebook.com/infowest WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
